diff --git a/res/res_stasis_mailbox.c b/res/res_stasis_mailbox.c
index 4522adc10d..5ed061de2e 100644
--- a/res/res_stasis_mailbox.c
+++ b/res/res_stasis_mailbox.c
@@ -93,6 +93,7 @@ struct ast_json *stasis_app_mailboxes_to_json()
 		}
 	}
 	ao2_iterator_destroy(&iter);
+	ao2_ref(mailboxes, -1);
 
 	return array;
 }